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Diesel and batteries
I have a 2007 GMC diesel. Recently, it wouldn't hold a charge so Kat took it to Walmart to have the batteries checked.
Tech said one was bad and we had it replaced.
After sitting for the weekend, no juice at all. Not even enough to unlock the doors with the remote.
Do both truck batteries need to be replaced if one is bad?
How would I go about looking for a phantom load?
Thx,
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